Gun sight



33-255- (JR 195729294 5R Feb. 9 1926. 1,572,294

D. w. KING GUN SIGHT Filed June 25 1925 WOIPWM' mitt, t t F? U 5 Patented Feb. 9, 1926.

UNITED STATES 1,572,294 PATENT OFFICE.

DEAN W. KING, OF SAN FRANCISCO, CALIFORNIA.

GUN SIGHT.

Application filed June 25, 1923. Serial No. 647,588.

To all whom it may concern:

Be it known that I, DEAN W. KING, a citizen of the United States, and a resident of San Francisco, county of San Francisco, State of California, have invented a new and useful Gun Sight, of which the following is a specification.

The present invention relates to improvements in gun sights and contemplates the providing of an adjustable rear sight through which a point at the front end of the gun may be viewed and brought in alignment with the object aimed at. It is particularly proposed to provide a sght of this character that is pivotally mounted on a transverse axis and may be swung from an inoperative downward position into an operative vertical position. It is further proposed to provide means in connection with this sight by which the same will be automatically locked when reaching its operative position, while providing additional means for selectively eliminating the locking feature. It is further proposed to provide means for raising and lowering the sight in connection with means for allowing this operation tobe performed only when the sight is swung into an intermediate position so that the elevation of the sight cannot be changed while the same is in an operative position, or while the same is in its normal resting position. It is further proposed to provide a scale in connection with the means for raising and lowering the sight which will indicate to the operator through what distance the sight is raised or lowered and in connection therewith yielding means for arresting the operation of the threaded means at each point of the scale so that the operator can ascertain by touch how far the elevation of the sight has been changed in case it is dark, or in case he does not wish to lose sight of the object to be aimed at. Further objects and advantages of the device will appear as the specification proceeds.

The preferred form of my device is illustrated in the accompanying drawing in which Figure 1 shows a side View of my device as attached to a gun; Figure 2 an enlarged side elevation of my device; Figure 3 a rear elevation of the same; Figure it a side elevation of the same as viewed from the opposite side tothat shown in Figure 2; Figure 5 a vertical section taken along line 5-5 of Figure 2; Figure 6 a vertical section taken along line 6--6 of Figure 3;

Figure 7 a detail view of a pivotally mounted sight supporting element as viewed from the left hand side of the gun; Figure 8 a plan view of a base member to which the said element is pivoted; Figure 9 a vertical section taken along line 9-9 of Figure 8; and Figure 10 a bottom plan view of another element used for raising and lowering the sight. While I have shown only the preferred form of the invention, it should be understood that various changes or modifications may be made within the scope of the claims hereto attached without dcparting from the spirit of the invention.

My device comprises as its principal parts the base (1) and the sight element (2). The base consists of a plate (3) formed to fit the slanting portion 1) of the stock of the gun (6) and adapted to be secured there to by means of screws passing through the perforations (7) in the front end of the base. The rear end of the base has two lips (8) and (9) rising therefrom in spaced and parallel relation, preferal'ily rounded at the top as shown at (11).

Between those lips is pivotally mounted on a pin (12) the sight element pre viously mentioned. The sight element comprises in its principal features the supporting member (13) pivoted between the lips, the sight (14) and the nut (16) for raising and lowering the sight.

The supporting member for the sight is illustrated in detail in Figure 7 and consists of a flat block fitting between the lips (8) and (9) of the base, rounded at the bottom as shown at (17) and flat on top shown at (18). From its center rises a, cylindrical projection (19) slotted on opposite sides as shown at (21) and provided at a distance from the top of the block with a collar (22) fixed thereto. Between the collar and the block is interposed a washer (23) of slightly larger diameter than the collar (22) so that when the nut (16) is forced upon the washer (28), in the manner shown in Figure 7, the nut may be rotated with the washer without touching the collar (22), which latter serves the purpose of preventing endwise motion of the washer. The sight (14) has a short stud (24:) secured thereto adapted to slidably engage the cylindrical member (19) and the two wings (26) extending from the stud laterally in with the internal thread (27) of the nut (16), the latter thread being formed in an inner flange (28) in the upper end of the nut.

The assembly thus far described operates as follows: The nut (16) is forced upon the washer (23) so as to be tightly secured thereto, whereupon the stud (24) of the sight is engaged with the cylindrical member (19) in such a. manner that the wings (26) ride in the slots (21). Upon depressing the stud the internal thread of the nut engages with the external thread on the two wings and if the nut is rotated the stud is caused to travel downward. It will be seen that in this manner the stud carrying the sight can be raised and lowered at will by turning the nut (16). The sight itself comprises a peep hole (29) which may be reduced in size by the introduction of a small sleeve (31) threadedly engaging the same and actuated by means of the milled head (32).

The nut (16) is graduated on its outside as shown at in the drawing and thereby indicates to the operator through what distance the sight has been raised or lowered by a certain turn of the nut. As shown in Figure 10 the nut is provided with a plurality of recesses (34) in its bottom face corresponding in number to the points of the scale. As the nut is rotated the recesses pass over a ball (36) confined in a cylindrical cavity (37 in the block (13), which latter ball is normally pushed upwardly by a spring (38) so that the ball is forced into each recess (34) as the nut is rotated and has a yielding tendency to stop the rotary motion of the nut, thereby indicating to the operator by mere touch that the nut has advanced to a new point on the scale. This feature is very important since it allows the operator to set the sight by touch without looking at the same.

The block or supporting member (13), as previously mentioned, is pivoted on the pin (12) extending through the lips and (9) and threadcdly engaging one of the same. This allows the whole device to be swung from the dotted line position shown in Figure 1 to the vertical position shown in full lines. \Vhen reaching this vertical position the supporting member 13) is locked against further pivotal motion by means of a small pin (39) normally forced into the recess (41) by the engagement of the block (13) with the two lips (8) and (9) but adapted to be projected outwardly by a spring (42) into a recess in the lip (8) when the sight reaches the vertical position shown in full lines in Figure 1. At the same time a spring actuated ball (44) projects into a recess (46) in the lip for yieldingly lockingthe sight in the upright position to hold the sight in place'it the positive locking means has been rendered inoperative. The pin (39) may be forced back into its recess against the resistance of the spring (42) by means of a small stud (4'7) projecting from the head (48) of the bolt (49) extending through the base in operative proximity to the sight and held in place by means of a nut (51). The head (48) which is eccentrically secured to the bolt (49) may be forced by the pressure of a thumb into a recess (52) provided for this purpose, whereby the pin (39) is forced into its recess so as not to interfere with the turning of the block (13). If it is desired to eliminate the positive locking feature altogether the nut (51) may be tightened upon the bolt (49) whereby the head (48) of the bolt is drawn into the recess (52) so that the stud (47) projecting from the head prevents the pin (39) from entering the recess (43) in the lip (8). In the latter case the ball (44) alone is relied on for yieldingly holding the block (13) in position.

In the right hand side of the block or sight supporting member (13) there is provided a circular recess (56) in which is disposed the cam (57), which latter is slotted in the center as shown at (58) so that it may ride on the pin (12). From the cam extends in a vertical. direction a thin projection (59) adapted to be forced into engagement with one of the recesses (34) within the nut by means of a spring" (61). The projection extends through a small passage (62) in the block which causes the cam to partake of the motion of the block. The thickness of the cam equals substantially the depth of the recess (56) so that the outer face of the cam is in easy sliding contact with the lip (9). The latter lip is provided in its outer face with a circular recess (63) in which fits a ring (64) provided with an inwardly extending stud (66) passing through a perforation (67) in the lip (9) and extending beyond the inner face of the said lip into the recess (56) of the block or supporting member (13). lVhile the latter block is swung from one position into another, the stud (66) which is stationary, rides over the cam (57). hen the sight supporting block (13) is in either the dotted line position or the full line position of Figure 1, the stud (66) engages one of tho 'sides of the cam (57) and does not prevent the spring (61) from forcing the projection (59) into one of the recesses (34) of the nut (16). But when the sight supporting block (13) is swung from one extreme position into the other extreme position the stud rides over the top of the cam and forces the same downwardly while the block occupies an intermediate position, and while the cam is thus forced downwardly its projection (59) becomes disengaged from the recess (34) in the nut and allows the latter to be rotated for the purpose of raising or lowering the sight.

It will thus be understood that the nut (16) cannot be rotated so long as the sight supporting block occupies one of its extreme positions shown in Figure 1, due to the engagement of the projection (59) of the cam (57 with one of the recesses (34) within the nut but that it can be rotated for adjustment of the elevation of the sight, while it occupies an intermediate position due to the fact that in that position the projection (59) is withdrawn from the recess (34) by the action of the cam (57) passing under the stationary stud (66).

To briefly reiterate the operation of the whole device: The nut (16) is forced upon the washer (23) which latter is rotatably mounted on the cylinder (19) and held in place by the collar (22) of slightly smaller diameter. The stud (24) is inserted into the cylinder (19) with the threaded wings of the stud engaging the slots (21) of the cylinder. The nut upon being rotated engages with the threads on the wings and imparts endwise motion to the stud (24). The nut has a scale thereon and for each point of the scale a recess (34) is provided in the bottom face of the nut. When the nut is rotated the recess-es (34) are successively engaged by the ball (36) whereby each point of the scale is indicated to the operator by touch.

The sight supporting block (13) is mounted pivotally on the pin (12) supported in the two lips (8) and (9) and may be swung from the dotted line position shown in Figure 1 to the full line position. It is automatically locked in the latter position by the pin (39) engaging with the recess (43), which locking means is positive and necessitates the handling of the head (48) of the bolt (49) if it is desired to swing the sight into an inoperative position. The locking feature may be eliminated, however, by tightening the nut (51) upon the bolt (49). A second yielding locking feature is provided in the ball (39) engaging automatically with the recess (46).

To raise or low-er the sight it is necessary to swing the sight supporting block (13) into an intermediate position since in both the active and the rest positions the nut (16) is prevented from rotating by the projection (59) of the cam (57) forced into one of the recesses (34) of the nut by the spring (61). Qnly when the sight supporting block (13) is swung into an intermediate position will 60 the stud (66) force the cam (57) downwardly over the resistance of the spring (61) and will thereby withdraw the projection (59) from the recess (34) it was engaged with so that at that time the nut may be rotated for the purpose of raising or lowering of the sight.

I claim:

1. A gun sight of the character described comprising a base having parallel lips projecting therefrom, a sight element hinged between the lips, a pin slidable transversely in the sight element having yielding means for forcing the same against one of the lips and into a recess in said lip when the sight element is swung into a vertical position for locking the same, and a bolt slidable in the base having a stud extending interiorly from the head thereof to bear against the end of the pin for pushing the same out of the recess when the bolt head is pressed upon.

2. A gun sight of the character described comprising a base having parallel lips projecting therefrom, a sight element hinged between the lips, a pin slidable transversely in the sight element having yielding means for forcing the same against one of the lips and into a recess in said lip when the sight element is swung into a vertical position for locking the same, and a bolt slidable in the base having a stud extending interiorly from the head thereof to bear against the end of the pin for pushing the same out of the recess when the bolt head is pressed upon, the bolt having a nut threaded thereon adapted to maintain the bolt in a position preventing the pin from being forced into the recess when the nut is tightened upon the bolt.

3. A gun sight of the character described comprising a base having parallel lips projecting therefrom, a block pivoted between the lips having a sight element disposed therein with freedom of longitudinal adjustability and a nut revolvably secured to the block and threaded on the sight element for effecting such adjustment, a cam mounted in a lateral recess in the block having a projection extending into a recess in the nut for locking the same, and a stationary pin extending through one of the lips into the DEAN W. KING. 

